Feasibility Study of Wave Tube Compression.
Final rept. Jul 65-Sep 67,
NAVAL WEAPONS CENTER CHINA LAKE CA
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A concept of wave tube compression, consisting of chopping a supersonic gas stream that was directed into an open-ended tube a wave tube, was investigated. The concept considered that the high-velocity pulse would transfer its kinetic energy to the air ahead and, in piston fashion, aspirate air into the tube behind it. This would result in the air being compressed by waves between pulses before mixing occurred. A simplified mathematical model was developed which indicated that the aspiration of air behind the pulses would be small. The model estimated that the maximum aspirated air, under the best conditions, would be only seven-tenths of the primary pulsed flow. Experimental tests, using primary gas at temperatures from 500 to 2000R and pulsing frequencies as high as 280 pulses per second, followed the trend of the aspiration model. The maximum air compression ratio obtained was 1.23. This value was obtained as the amount of aspirated air approached zero. Author
- Fluid Mechanics